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https://issues.apache.org/jira/browse/HADOOP-9565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15396092#comment-15396092
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Chris Nauroth commented on HADOOP-9565:
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I haven't looked at this patch in a while, but has there been any consideration
of
[ViewFs|http://hadoop.apache.org/docs/r2.7.2/hadoop-project-dist/hadoop-hdfs/ViewFs.html]?
With ViewFs, we'd have a single {{FileSystem}} instance visible to the
caller, but it would route to different {{FileSystem}} implementations
dependent upon the specified {{Path}}. It might be an object store for some
paths, but HDFS for others. Does this API somehow need to be sensitive to
{{Path}}?
> Add a Blobstore interface to add to blobstore FileSystems
> ---------------------------------------------------------
>
> Key: HADOOP-9565
> URL: https://issues.apache.org/jira/browse/HADOOP-9565
> Project: Hadoop Common
> Issue Type: Improvement
> Components: fs, fs/s3, fs/swift
> Affects Versions: 2.6.0
> Reporter: Steve Loughran
> Assignee: Pieter Reuse
> Attachments: HADOOP-9565-001.patch, HADOOP-9565-002.patch,
> HADOOP-9565-003.patch, HADOOP-9565-004.patch, HADOOP-9565-005.patch,
> HADOOP-9565-006.patch
>
>
> We can make the fact that some {{FileSystem}} implementations are really
> blobstores, with different atomicity and consistency guarantees, by adding a
> {{Blobstore}} interface to add to them.
> This could also be a place to add a {{Copy(Path,Path)}} method, assuming that
> all blobstores implement at server-side copy operation as a substitute for
> rename.
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